Lignin derivative, lignin resin composition, rubber composition, and molding material

a technology of lignin resin and derivative, which is applied in the field of lignin derivative, lignin resin composition, rubber composition, and molding material, can solve the problems of reduced rigidity or mechanical strength of rubber composition, large quantities of phenols, and increased production costs, and achieve elastic modulus, or tensile properties, and excellent low hysteresis loss characteristics

Active Publication Date: 2018-11-27
SUMITOMO BAKELITE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031]According to the invention, a lignin resin composition, a rubber composition, or a molding material, which has excellent low hysteresis loss characteristics, elastic modulus, or tensile properties, can be obtained by incorporating a lignin derivative having a predetermined number average molecular weight and containing a component soluble in a polar organic solvent (soluble component). Furthermore, when a component that is thermofusible is used as the soluble component, a lignin resin composition, a rubber composition, or a molding material, which has superior aforementioned characteristics, can be obtained. Particularly, when a phenolic resin is incorporated, a lignin resin composition, rubber composition, or molding material thus obtainable exhibits excellent low hysteresis loss characteristics, and achieves an excellent balance between the elastic modulus, moldability, and tensile properties.

Problems solved by technology

However, global environment protection has become an important problem to be solved, and from that point of view, studies have begun to be made on reutilization and recycling of ligneous waste materials.
However, in this case, such lignin derivatives do not have sufficient characteristics as filler materials, and cause a decrease in rigidity or mechanical strength of a rubber composition.
However, although systems using various lignophenol derivatives are disclosed, these systems include large quantities of phenols, which are petroleum-derived components, and a rubber reinforcing effect for rigidity or the like is also insufficient.

Method used

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  • Lignin derivative, lignin resin composition, rubber composition, and molding material
  • Lignin derivative, lignin resin composition, rubber composition, and molding material
  • Lignin derivative, lignin resin composition, rubber composition, and molding material

Examples

Experimental program
Comparison scheme
Effect test

example 1a

[0245](1) Lignin Derivative

[0246]300 g (absolute dry weight) of cedar chips and 1,600 g of pure water were introduced into a rotary autoclave having a capacity of 2.4 L. Then, while the content was stirred at a speed of rotation of 300 rpm, the content was treated at a treatment temperature of 300° C. and a treatment pressure of 9 MPa for 60 minutes, and thus the cedar chips were decomposed.

[0247]Next, the decomposition product was filtered and washed with pure water, and thereby a water-insoluble portion was separated. This water-insoluble portion was immersed in acetone and then filtered, and an acetone-soluble portion was collected.

[0248]Next, acetone was distilled off from the acetone-soluble portion, and lignin derivatives were obtained.

[0249](2) Production of Rubber Composition

[0250]Next, 50 parts by mass of the lignin derivatives and 50 parts by mass of a cashew-modified phenolic resin were melted and mixed in advance on a hot plate at 130° C., and the mixture was pulverized....

example 2a

[0252]A rubber composition was obtained in the same manner as in Example 1A, except that the amount of the lignin derivatives was changed to 100 parts by mass, and a phenolic resin-based substance was not added thereto.

example 3a

[0253]A rubber composition was obtained in the same manner as in Example 1A, except that 50 parts by mass of a tall-modified phenolic resin was added instead of the cashew-modified phenol.

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Abstract

A lignin derivative that is extracted from biomass and is used for rubber reinforcement or for use in a molding material is provided. Such a lignin derivative has a number average molecular weight of 300 to 2,000, and contains a component that is soluble in a polar organic solvent, in an amount of 80% by mass or more. When such a lignin derivative is incorporated, a lignin resin composition, a rubber composition, or a molding material, all of which have excellent low hysteresis loss characteristics, elastic modulus, or tensile properties, can be obtained. Furthermore, when a component that is thermofusible is used as the soluble component, a lignin resin composition, a rubber composition, or a molding material, all of which have superior aforementioned characteristics, can be obtained.

Description

TECHNICAL FIELD[0001]The present invention relates to a lignin derivative, a lignin resin composition, a rubber composition, and a molding material.BACKGROUND ART[0002]In recent years, there has been a demand for development of a technology of utilizing biomass of plants or plant-derived processed products, and a technology of converting biomass into petroleum-derived chemical products, resin products, and the like. For example, ligneous waste materials such as bark, lumber from thinning, and construction waste materials have been hitherto mostly disposed of. However, global environment protection has become an important problem to be solved, and from that point of view, studies have begun to be made on reutilization and recycling of ligneous waste materials.[0003]Major components of general ligneous materials are cellulose, hemicellulose, and lignin. Among these, lignin is included at a proportion of about 30% in the ligneous materials, and since lignin has a structure richly conta...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08L97/00C08L21/00C07G1/00C08L1/02C08K5/00C08H7/00
CPCC08L97/005C07G1/00C08H6/00C08K5/0025C08L21/00C08L97/00C08L1/02C08L2205/22C08L2205/02C08H8/00C08L7/00C08L61/14C08K3/04C08K3/06C08K5/17C08K3/22C08K5/09
Inventor MURAI, TAKETOSHINAKAGAWA, HIROSHIGEMATSUMOTO, MITSUTAKA
Owner SUMITOMO BAKELITE CO LTD
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